<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <div id="app"></div>

    <script>
        const { createApp } = Vue
        createApp({
            template: `<h2 id="h2">{{count}}</h2>
                        <button id='minus' @click='minus'>-1</button>
                        <button id='add' @click='add'>+1</button>`,
            data:function(){
                return{     // 响应式
                    count : 10
                }
            },
            methods:{
                minus(){
                    this.count--
                },
                add (){
                    this.count++
                }
            }
            }).mount('#app')

    </script>
</body>
</html>